package com.guw.TestThread;

//观察线程状态
//可以用来观测线程运行情况,以便采取对应措施
//线程死亡之后就无法再次启动了
public class TestState {

    public static void main(String[] args) {
        Thread thread = new Thread(()->{
            for (int i = 0; i < 5 ; i++) {
                try {
                    Thread.sleep(1000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
            System.out.println("========");
        });

        //观察状态
        Thread.State state = thread.getState();
        System.out.println(state);   //NEW

        //观察启动后
        thread.start();
        state = thread.getState();
        System.out.println(state);

        //线程状态Thread.State.TERMINATED终止
        while (state != Thread.State.TERMINATED){
            try {
                Thread.sleep(100);
                state = thread.getState();
                System.out.println(state);  //TIMED_WAITING
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }
}
